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Graphene-polypyrrole/platinum nano modified glassy carbon electrode, preparation method for same and application thereof

A glassy carbon electrode and graphene technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as catalyst poisoning and deactivation, DMFC efficiency decline, etc., and achieve high current density, large mass activity, and strong anti-toxicity effects

Inactive Publication Date: 2013-03-13
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although theoretically DMFC has a high power density and good application prospects, due to the strong adsorption and accumulation of CO, an intermediate product produced during the methanol oxidation process, on the surface of the catalyst, the catalyst is poisoned and deactivated, resulting in a decrease in the actual efficiency of DMFC.

Method used

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  • Graphene-polypyrrole/platinum nano modified glassy carbon electrode, preparation method for same and application thereof
  • Graphene-polypyrrole/platinum nano modified glassy carbon electrode, preparation method for same and application thereof
  • Graphene-polypyrrole/platinum nano modified glassy carbon electrode, preparation method for same and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039](1) Polishing of the glassy carbon electrode: the glassy carbon electrode is polished to a mirror surface with aluminum oxide suspensions with a particle size of 0.3 μm and 0.05 μm, and then the glassy carbon electrode is polished to a mirror surface with 99% ethanol by volume fraction, twice Ultrasonic cleaning with distilled water to obtain a polished glassy carbon electrode 1;

[0040] (2) Preparation of graphene-modified glassy carbon electrode: blow dry the glassy carbon electrode 1 treated in step (1) with high-purity nitrogen, and evenly coat the surface with a graphene solution with a volume and concentration of 5 μl and a concentration of 1 mg / ml. Bake under an infrared lamp until no liquid remains to obtain a graphene-modified glassy carbon electrode 2;

[0041] (3) Preparation of graphene-polypyrrole-modified glassy carbon electrode: place the graphene-modified glassy carbon electrode 2 obtained in step (2) in pyrrole, NaHCO 3 and LiClO 4 In the electrolyte ...

Embodiment 2

[0049] (1) The polishing of the glassy carbon electrode is the same as in Example 1;

[0050] (2) The preparation of the graphene-modified glassy carbon electrode is the same as in Example 1;

[0051] (3) Preparation of graphene-polypyrrole-modified glassy carbon electrode: the graphene-modified glassy carbon electrode 2 obtained in step (2) was placed in a 3 and LiClO 4 In the electrolyte solution, pyrrole was electrodeposited at a constant potential of 0.6V for 20s to obtain a graphene-polypyrrole modified glassy carbon electrode 3;

[0052] (4) Preparation of graphene-polypyrrole / platinum nano-modified glassy carbon electrode: Rinse the graphene-polypyrrole-modified glassy carbon electrode 3 obtained in step (3) with double distilled water, and 2 SO 4 and H 2 PtCl 6 In the electrolyte solution, the graphene-polypyrrole modified glassy carbon electrode 3 is used as the working electrode, Ag / AgCl is used as the reference electrode, and platinum wire is used as the counte...

Embodiment 3

[0055] (1) The polishing of the glassy carbon electrode is the same as in Example 1;

[0056] (2) The preparation of the graphene-modified glassy carbon electrode is the same as in Example 1;

[0057] (3) Preparation of graphene-polypyrrole-modified glassy carbon electrode: the graphene-modified glassy carbon electrode 2 obtained in step (2) was placed in a 3 and LiClO 4 In the electrolyte solution, pyrrole was electrodeposited at a constant potential of 0.7V for 30s to obtain a graphene-polypyrrole modified glassy carbon electrode 3;

[0058] (4) Preparation of graphene-polypyrrole / platinum nano-modified glassy carbon electrode: Rinse the graphene-polypyrrole-modified glassy carbon electrode 3 obtained in step (3) with double distilled water, and 2 SO 4 and H 2 PtCl 6 In the electrolyte, the graphene-polypyrrole modified glassy carbon electrode 3 is used as the working electrode, Ag / AgCl is used as the reference electrode, and platinum (Pt) wire is used as the counter el...

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Abstract

The invention discloses a graphene-polypyrrole / platinum nano modified glassy carbon electrode and a preparation method for the same. The preparation method particularly includes the steps of polishing a glassy carbon electrode, and preparing a grapheme modified glassy carbon electrode, a graphene-polypyrrole modified glassy carbon electrode and the graphene-polypyrrole / platinum nano modified glassy carbon electrode. The obtained graphene-polypyrrole / platinum nano modified glassy carbon electrode is used as a catalyst for methanol oxidation in a methanol fuel cell. The graphene-polypyrrole / platinum nano modified glassy carbon electrode has the advantages of high dispersion, high catalytic activity and high anti-toxicity.

Description

technical field [0001] The invention relates to a modified electrode, in particular to a graphene-polypyrrole / platinum nanometer modified glassy carbon electrode and a preparation method and application of the modified electrode. Background technique [0002] Polypyrrole is a heterocyclic conjugated conductive polymer that has been studied and used more often. It is usually an amorphous black solid and uses pyrrole as a monomer. It can usually be made into a conductive film by electrochemical oxidation polymerization, and it can also be made into a conductive film by electrochemical oxidation. Chemical anodization of pyrrole for synthesis. Conductive polypyrrole has conjugated chain oxidation, corresponding anion-doped structure, and the conductivity can reach 10 2 ~10 3 S / cm, so it is a good conductive material. At the same time, polypyrrole can also be used for biology, ion detection, supercapacitor and antistatic materials, modified electrodes for photoelectrochemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 卢小泉赵文高周喜斌
Owner NORTHWEST NORMAL UNIVERSITY
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